21192080

素因数分解:

$2^4\times 5^1\times 7^1\times {\mathrm{13}}^1\times {\mathrm{41}}^1\times {\mathrm{71}}^1$

素因数の和:145

約数の個数: 160

約数和(自身を含む): 62995968

約数和(自身を除く): 41803888

約数列:

[1, 2, 4, 5, 7, 8, 10, 13, 14, 16, 20, 26, 28, 35, 40, 41, 52, 56, 65, 70, 71, 80, 82, 91, 104, 112, 130, 140, 142, 164, 182, 205, 208, 260, 280, 284, 287, 328, 355, 364, 410, 455, 497, 520, 533, 560, 568, 574, 656, 710, 728, 820, 910, 923, 994, 1040, 1066, 1136, 1148, 1420, 1435, 1456, 1640, 1820, 1846, 1988, 2132, 2296, 2485, 2665, 2840, 2870, 2911, 3280, 3640, 3692, 3731, 3976, 4264, 4592, 4615, 4970, 5330, 5680, 5740, 5822, 6461, 7280, 7384, 7462, 7952, 8528, 9230, 9940, 10660, 11480, 11644, 12922, 14555, 14768, 14924, 18460, 18655, 19880, 20377, 21320, 22960, 23288, 25844, 29110, 29848, 32305, 36920, 37310, 37843, 39760, 40754, 42640, 46576, 51688, 58220, 59696, 64610, 73840, 74620, 75686, 81508, 101885, 103376, 116440, 129220, 149240, 151372, 163016, 189215, 203770, 232880, 258440, 264901, 298480, 302744, 326032, 378430, 407540, 516880, 529802, 605488, 756860, 815080, 1059604, 1324505, 1513720, 1630160, 2119208, 2649010, 3027440, 4238416, 5298020, 10596040, 21192080]

約数ペア:

[(1, 21192080), (2, 10596040), (4, 5298020), (5, 4238416), (7, 3027440), (8, 2649010), (10, 2119208), (13, 1630160), (14, 1513720), (16, 1324505), (20, 1059604), (26, 815080), (28, 756860), (35, 605488), (40, 529802), (41, 516880), (52, 407540), (56, 378430), (65, 326032), (70, 302744), (71, 298480), (80, 264901), (82, 258440), (91, 232880), (104, 203770), (112, 189215), (130, 163016), (140, 151372), (142, 149240), (164, 129220), (182, 116440), (205, 103376), (208, 101885), (260, 81508), (280, 75686), (284, 74620), (287, 73840), (328, 64610), (355, 59696), (364, 58220), (410, 51688), (455, 46576), (497, 42640), (520, 40754), (533, 39760), (560, 37843), (568, 37310), (574, 36920), (656, 32305), (710, 29848), (728, 29110), (820, 25844), (910, 23288), (923, 22960), (994, 21320), (1040, 20377), (1066, 19880), (1136, 18655), (1148, 18460), (1420, 14924), (1435, 14768), (1456, 14555), (1640, 12922), (1820, 11644), (1846, 11480), (1988, 10660), (2132, 9940), (2296, 9230), (2485, 8528), (2665, 7952), (2840, 7462), (2870, 7384), (2911, 7280), (3280, 6461), (3640, 5822), (3692, 5740), (3731, 5680), (3976, 5330), (4264, 4970), (4592, 4615)]